Yes, two moons, just to add to the other answers here, there's a fun story about them. Jonathon Swift's fictional astronomers on the floating island of Laputia "discovered them" in his book before they were found by real life astronomers.
He may have got the idea from Kepler who tried to unscramble an anagram by Galileo describing one of his discoveries. Galileo had actually observed what we now know to be the rings of Saturn.
Kepler deciphered his anagram to say that Mars has two moons.
See Jonathan Swift and the moons of Mars
". discovered two lesser stars, or satellites, which revolve around Mars, whereof the innermost is distant from the center of the primary exactly three of his diameters, and the outermost five: the former revolves in the space of ten hours, and the latter in twenty-one and a half."He also got quite close to the actual values - well - within a factor of two ros - not that close, but close enough to be a fun coincidence.
He may have got the idea from Kepler who tried to unscramble an anagram by Galileo describing one of his discoveries. Galileo had actually observed what we now know to be the rings of Saturn.
Kepler deciphered his anagram to say that Mars has two moons.
See Jonathan Swift and the moons of Mars
About the Author
Robert Walker
Writer of articles on Mars and Space issues - Software Developer of Tune Smithy, Bounce Metronome etc.Studied at Wolfson College, Oxford
Lives in Isle of Mull
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